1. Previously incorrectly reported as
3,670,155 due to a mathematical error.

2. The option vested and became
exercisable as to 118,770 shares on February 24, 2006, and 118,770
shares on December 20, 2006, and will vest and become exercisable
as to 118,770 shares on December 20, 2007. The vesting increments
were previously reported as 118,758 shares due to a mathematical
error.

3. The exercise price was previously
incorrectly reported as $1.50 per share.

4. The option is fully vested and
exercisable.

5. The exercise price was previously
incorrectly reported as $0.40 per share.

6. Dr. Henderson shares a household with
Asrun Kristmundsdottir, the Director of Business Management for the
issuer's wholly-owned subsidiary BioForce Nanosciences, Inc. Dr.
Henderson disclaims beneficial ownership of all options held by Ms.
Kristmundsdottir.

7. The exercise price was previously
incorrectly reported as $1.00 per share.

Remarks:

By: Laura E. Carabillo,
Attorney in Fact for Eric R. Henderson

06/15/2007

** Signature of Reporting Person

Date

Reminder: Report on a
separate line for each class of securities beneficially owned
directly or indirectly.

* If the form is filed by
more than one reporting person, see Instruction 5
(b)(v).